Anyone here using Microsoft's Security Essentials? I have been using it for about 5 days now. Yesterday I got a virus e-mail and the program did not catch it. The e-mail was suppose to be from DHL shipping, stating that my package could not be delivered and it urged me to open a document file. I did not try to open the file so it is possible that SE would have caught it but I'm not curious enough to find out

I'm 99% sure it's a virus, I Googled it and it's been floating around since Summer of 2008.
Any thoughts/experiences on Microsoft's anti virus program?
Thanks